[dd_agent_format] Replace all `+` from version string with `.` (#27)
[dd_agent_format] Replace all `+` from version string with `.` (#27)

`+` is not allowed in S3 object names so make sure that there's no
remaining `+` in the version string
DataDog/omnibus-ruby,DataDog/omnibus-ruby,DataDog/omnibus-ruby